a and b please in standard ML

a). Write a function of type string -> string that returns the string "Hello, Name!", where Name is the given input string.

b). Write a function permute of type a list -> a list whose output list is the same as the input list, but with the first two elements of the list swapped. For example: permute ([1,2,3,4]) should return [2,1,3,4] or permute([a,b,c]) should return [b,a,c].